Yeah, I'm not sure and it's not official (I think) but I read the comment of other members in a facebook page about this subject and they said that it's a new unit : Kendo unit ^^

Ummm.... with SG we can expect all clubs that exist at school :P And it's why I like them, they have so many type of music with :DPlus, Sleepiece have just been disbanded so maybe it's why they created a new unit (>o<)